1JLW

Anopheles dirus species B glutathione S-transferases 1-4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structures of glutathione S-transferases isozymes 1-3 and 1-4 from Anopheles dirus species B.

Oakley, A.J.Harnnoi, T.Udomsinprasert, R.Jirajaroenrat, K.Ketterman, A.J.Wilce, M.C.

(2001) Protein Sci. 10: 2176-2185

  • DOI: 10.1110/ps.ps.21201
  • Primary Citation of Related Structures:  1JLV

  • PubMed Abstract: 
  • Glutathione S-transferases (GSTs) are dimeric proteins that play an important role in cellular detoxification. Four GSTs from the mosquito Anopheles dirus species B (Ad), an important malaria vector in South East Asia, are produced by alternate splic ...

    Glutathione S-transferases (GSTs) are dimeric proteins that play an important role in cellular detoxification. Four GSTs from the mosquito Anopheles dirus species B (Ad), an important malaria vector in South East Asia, are produced by alternate splicing of a single transcription product and were previously shown to have detoxifying activity towards pesticides such as DDT. We have determined the crystal structures for two of these alternatively spliced proteins, AdGST1-3 (complexed with glutathione) and AdGST1-4 (apo form), at 1.75 and 2.45 A resolution, respectively. These GST isozymes show differences from the related GST from the Australian sheep blowfly Lucilia cuprina; in particular, the presence of a C-terminal helix forming part of the active site. This helix causes the active site of the Anopheles GSTs to be enclosed. The glutathione-binding helix alpha2 and flanking residues are disordered in the AdGST1-4 (apo) structure, yet ordered in the AdGST1-3 (GSH-bound) structure, suggesting that insect GSTs operate with an induced fit mechanism similar to that found in the plant phi- and human pi-class GSTs. Despite the high overall sequence identities, the active site residues of AdGST1-4 and AdGST1-3 have different conformations.


    Organizational Affiliation

    Department of Pharmacology/Crystallography Centre, University of Western Australia, Crawley 6009, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
glutathione transferase GST1-4
A, B
219Anopheles cracensGene Names: GST1
EC: 2.5.1.18
Find proteins for Q7KIF1 (Anopheles cracens)
Go to UniProtKB:  Q7KIF1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.223 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 49.440α = 90.00
b = 49.440β = 90.00
c = 271.810γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
MOLREPphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-07-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance